Evaluate the sum.
A. 248
B. 223
C. 308
D. 283
Answer: C
Mathematics
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Use the elimination method to solve the system.4x + 2y = 197x - 2y = 19.5
A. (3.5, 3) B. (3.5, 2.5) C. (2.5, 3.5) D. (4, 2.5)
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Find the vertex, focus, directrix, and focal width of the parabola.x2 = 28y
A. Vertex: (0, 0); Focus: (7, 0); Directrix: x = 7; Focal width: 7 B. Vertex: (0, 0); Focus: (7, 0); Directrix: y = 7; Focal width: 112 C. Vertex: (0, 0); Focus: (0, -7); Directrix: x = -7; Focal width: 112 D. Vertex: (0, 0); Focus: (0, 7); Directrix: y = -7; Focal width: 28
Mathematics
Write in scientific notation.603.8
A. 6.038 × 10-2 B. 6.038 × 101 C. 6.038 × 102 D. 6.038 × 10-1
Mathematics
Provide an appropriate response.The derivative of 2x =
A. 2x
B. x2x - 1
C. 2x ln 2
D. 
Mathematics